Texas Instruments 74FCT162H245ATPACT

Overview

74FCT162H245ATPACT from Texas Instruments is a 16-bit bidirectional bus transceiver with bus-hold inputs, 24-mA balanced output drivers, 4.5 ns max propagation delay (A→B/B→A), and I_off support for partial-power-down operation. It operates at 5V ±10% across –40°C to +85°C and is used in industrial backplane interfaces requiring noise-immune data translation between synchronous buses.

For engineers reviewing the 74FCT162H245ATPACT datasheet, 74FCT162H245ATPACT pinout, 74FCT162H245ATPACT application, or 74FCT162H245ATPACT equivalent, key selection criteria include bus-hold functionality eliminating external bias resistors, guaranteed 24-mA drive strength per output, TSSOP-48 package compatibility with high-density PCB layouts, and industrial temperature-rated I_off protection during power sequencing.

Technical Context

This device implements dual 8-bit or unified 16-bit bidirectional data transfer controlled by DIR (direction) and active-low OE (output enable). Bus-hold circuitry actively retains the last valid logic state on all A- and B-side inputs when floating, preventing metastability without external components.

Its 24-mA balanced sourcing/sinking capability ensures matched rise/fall times and reduced ground bounce (<0.6 V typical VOLP), while edge-rate control circuitry limits di/dt to suppress system-level switching noise-critical for signal integrity in multi-drop bus environments.

Key Specifications

Pinout & Package

48-pin TSSOP (DGG) package, 0.5-mm pitch, 12.5 mm × 6.1 mm footprint, 1.2 mm max height, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit bus transceiver applications.

Compared with CY74FCT162245ATPACT, the 74FCT162H245ATPACT adds bus-hold at identical speed and drive strength-enabling resistor-free input stabilization. Versus SN74LVC16245ADGGR, it supports direct 5-V integration but consumes more static current and lacks 3.3-V compatibility.

Availability

74FCT162H245ATPACT is available at Aetrix Electronics and suitable for industrial automation, PLC backplane interfaces, and FPGA mezzanine card designs requiring stable component supply, long-lifecycle support, and verified 5-V bus transceiver performance.

Supply support for 74FCT162H245ATPACT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with decades of industrial-grade reliability validation.

The 74FCT family delivers high-speed, low-noise 5-V CMOS logic optimized for backplane, bus interface, and real-time control applications where signal integrity and power sequencing robustness are critical.

FAQ

What is the maximum propagation delay specification for 74FCT162H245ATPACT?

The 74FCT162H245ATPACT has a maximum propagation delay of 4.5 ns for data transfer in either direction (A→B or B→A) across the full industrial temperature range. This value is measured under standard load conditions and ensures timing predictability in synchronous bus architectures operating up to 20-MHz clock rates. The 74FCT162H245ATPACT meets this spec consistently due to its edge-rate controlled outputs and matched driver design.

Does 74FCT162H245ATPACT support partial power-down operation?

Yes, the 74FCT162H245ATPACT integrates I_off circuitry that disables all outputs and limits current flow to ±1 µA when VCC = 0 V. This allows safe insertion or removal in live backplane systems and supports mixed-voltage power sequencing without risk of back-driving or latch-up. The 74FCT162H245ATPACT maintains this behavior across its full –40°C to +85°C operating range.

How does the bus-hold feature of 74FCT162H245ATPACT eliminate external resistors?

The 74FCT162H245ATPACT provides active bus-hold on all 32 data terminals (A1–A16, B1–B16), sustaining the last valid logic state with ±100 µA hold current. This prevents floating inputs during tri-state transitions or unconnected slots, removing the need for discrete 4.7-kΩ pull-up/down resistors. The 74FCT162H245ATPACT achieves this using internal feedback circuitry-not external components-reducing BOM cost and PCB area.

What are the key differences between 74FCT162H245ATPACT and CY74FCT162245ATPACT?

The 74FCT162H245ATPACT adds bus-hold functionality to the identical 24-mA drive strength, 4.5 ns propagation delay, and TSSOP-48 package of CY74FCT162245ATPACT. While both parts share pinout and electrical timing, only the 74FCT162H245ATPACT retains input states during high-impedance conditions-eliminating external biasing. The 74FCT162H245ATPACT is therefore preferred in modular or hot-pluggable systems where input stability cannot rely on board-level resistors.

Is 74FCT162H245ATPACT compatible with 3.3-V logic interfaces?

No, the 74FCT162H245ATPACT is a 5-V-only device with VCC = 5 V ±10% and input thresholds referenced to 5-V rails (VIH = 2.0 V min, VIL = 0.8 V max). It is not 3.3-V tolerant and will not reliably interface with LVTTL or LVCMOS 3.3-V systems without level-shifting. For 3.3-V applications, consider SN74LVC16245ADGGR instead-but note its pinout differs and it lacks bus-hold. The 74FCT162H245ATPACT is strictly intended for 5-V environments.